Hi Jackal,
I never experienced such behavior. I'll try to reproduce the issue but for now everything is ok on my side (Having a session with AL2 on a track and 8+ Audio tracks, all faders are working as expected when switching from DAW to AL Mode). What bother me is that you said that it was working for on hour and then it started to bug... I'm investigating.
Can you tell me on which OS Live is running ?
Regards,
Matthieu